×

Power management for modulated backlights

  • US 10,460,679 B2
  • Filed: 03/15/2017
  • Issued: 10/29/2019
  • Est. Priority Date: 09/30/2008
  • Status: Active Grant
First Claim
Patent Images

1. A display, comprising:

  • a premodulator device including a plurality of individually controllable light sources and being configured to produce a first modulated light according to an image to be displayed, each of the individually controllable light sources being associated with at least one of a plurality of regions of the image to be displayed;

    a primary modulator device illuminated by the first modulated light and configured to further modulate the first modulated light to produce further modulated light carrying the image to be displayed; and

    a controller coupled to the premodulator device and the primary modulator device, the controller being configuredto evaluate image data representative of the image to be displayed to determine power information associated with each of the regions,to compare the power information to a threshold power value, andwhen the power information indicates an exceedance of the threshold power value, to reallocate power within the premodulator to implement a change in brightness of an area of the first modulated light associated with a particular region and to change modulation by the primary modulator device to accommodate the reallocation of power by the premodulator; and

    whereinthe controller reallocates power by selectively decreasing the brightness of at least one area of the first modulated light and selectively increasing the brightness of another area of the first modulated light; and

    an aggregate brightness of the first modulated light is decreased.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×